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<title>Darwin Format Checks (Using the GNU Compiler Collection (GCC))</title>

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<h4 class="subsection" id="Darwin-Format-Checks-1"><span>6.61.2 Darwin Format Checks<a class="copiable-link" href="#Darwin-Format-Checks-1"> &para;</a></span></h4>

<p>In addition to the full set of format archetypes (attribute format style
arguments such as <code class="code">printf</code>, <code class="code">scanf</code>, <code class="code">strftime</code>, and
<code class="code">strfmon</code>), Darwin targets also support the <code class="code">CFString</code> (or
<code class="code">__CFString__</code>) archetype in the <code class="code">format</code> attribute.
Declarations with this archetype are parsed for correct syntax
and argument types.  However, parsing of the format string itself and
validating arguments against it in calls to such functions is currently
not performed.
</p>
<p>Additionally, <code class="code">CFStringRefs</code> (defined by the <code class="code">CoreFoundation</code> headers) may
also be used as format arguments.  Note that the relevant headers are only likely to be
available on Darwin (OSX) installations.  On such installations, the XCode and system
documentation provide descriptions of <code class="code">CFString</code>, <code class="code">CFStringRefs</code> and
associated functions.
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